Tool-holder.



1. M. CARPENTER..

TOOL HOLDER.v

' APPLICATloN FILED MAYZI. 1915.

' Patented Nov. '9, 1915.

2 SHEETS-SHEET l.

-l/VVENTOI? Byh/LMW() A Trae/ufr J. M.,l CARPENTER.

, TOOL HOLDER.

APPLICATION FILED MAY ZI. 1915. l 1,160,042. Patented Nov. 9, 1915.

"' 5 2 SHEETS-SHEET 2.

TqE.

'Fila-5f By a?? for receiving the clamping; screw 14 Where- A'vvith abeveled PQOH l5, a pul'aH-ty of dogs 16 are provided, therebeing one'dog for each of the .prongs of die 4, said d ogs Y being formed vvith asquared portion 17 on one side for engaging the rear side face of therespective prongs and of the inclined section 18, which inclined sectionextends t o the next prong of the die, as shown 1n Fig. 3. For instance,the dog 16 which engag'esthe rear face of prong 19 yhas 'abeveledportion 18 extendingto the prong 20, and the dog 16 engaging the rearface of prong 20 has a beveled portion extendingto the next prong, andsoon for all the prongs.

The beveled portions 18 act as a guide fior guiding the shavings or thecut of the .die outwardly and thereby discharge-the saine eXteriorly ofthe die.

By providing the screw 14 and''asociatedparts the prongs may be movedradially in- Wardly until the proper adjustment vis secured and the dogs16`present means for preventing vany torsional or twisting movement ofthe prongs.

direction, both' in a vertical and a horizontal plane, which naturallywould cause the cutting of comparatively poor threads. providing thedogs 16 no'movement of the prongs would be permitted independent of thevsleeve. 11 and the socket member 10' whereby the teeth of the die mustsquarely. .and properly .meet the material ybeing threaded.

In' forming'the sleeve 11, sometimes it is desirable to construct thesame eXactiy as shown in Figs. 1 to 4, inclusive, soies to re'- ceivethe pronged die having beveled prongs,

-while at other timesv it is desirable to form the sleeve so as toreceive a pronged die without the bevels or pronged cutter 'Withoutbevels. sleeve 21 is provided having the dogs 16 as in the preferredstructure, but. interiorly being formed with a short beveled portion 22and with a straight portion 23 4for engaging the peripheral part of theprongs of' thev tool '24. side'from the arrangement of the .bevel 22 andthe straight'portion 23 the construction is .similar'to that shown inthe preferred form and therefore. Will need no additional description.

lin Figs. 9 endl() will be seen a farther modified formottheiinventionjin. which i During the operation thev tendency is tomove the prongs in a circular In an instance of this kind a income thesleeve 25' is used, Whichvsleeve is lsee'nired dental movement byl anyydesirablemeans, as

portions 28 engaging f-rthelupper surface of so lthat when the sleeve isscrewed 1in'y .one direction the prongs #will be. contracted or' movedradially inv-gardly'. The Aen'd- 2T, in addition to the beveledportion-28, is -pro-v in place vbyv threads andheld againstacci flforinstance loclr'nut 26.` The-sleeve 25 is v l preferably straightinteriorly but iis pijovided with an` end 27 ,havingbeveled or cam thedie 4,- as more" clearly shown in Fig. '9.,-

vided with dogs16as'in thefpreerredftorm, so as to 'brace the .prongsand'gpresent dis'- charge bevels 18 for" disposing'ofthef maseA I terialto be cui! trom. article being threaded.

Sometimes during .mannfactnre v thev I i dies 4 the vteethdof-notproperly `aline after tempering, which will4 cause some oftherear teeth to scrape the threads out' by theouter teethv .and therebyproduce some finie .shav-v ings that must be eliminated. :'1`he'sleev'e25 .is provided with a plnrality xofppenings 29 inorder that theseshavings' 'may be easily L removed.

In all, three formso'f -it Will i i of the respectiveicutt'in'gtoolsfagain'stdistor# .be observed thatthesaine ormbf dog is f .'.used'for lbijacirng; vand', holding the prongs '95 tion, These dogs'aefl'tendedlto holdthe original' position.` While niiderstrain,vvlier'e` outer end of the prongsiof the=tob1s i-n their ,Y

by a perfect thread Avor perfect-cnt Lepre-'-` duced. In the formshoWn--inigs litio' 7.

a split sleeve isprovided'Which is operated `for squeezing the prongsand rtlriereby-.inoving the same radially inwardlyg"whileinthel I,

form shown in Figs S31-and 10'tlj1e'-kprongsfare` moved radially'inwardly-bythe longitudinal movement of the .sleeve and p-ressi'ire'ofthe beveled or cam-portions ,28jagainstithe lbeveled portierin ofvthe die. f

'1" I e i001 holder ofniet-.entracte as;

scribed, thecombination ivithafsocketimember for receivlng a prongedtoch'of 'a sleeve co-acting with saidsocket'membeig Said sleevetelescoping over the prongs oisaid .ils

tool, means arran'ge` d onl said^sleeve$for squeezing or moving radially'--inwardly .the prongs ofsaid tool, and a dog on said sleeve for eachof the prong'sof said toolfor holdplace.`

1n a'tool holder. ot the character de;

. ing all otsaid prongs in their normal position with respect to theAbase. of theftool,

.whereby no 'distortion of the prongs can take scribed, the combinationwithv aqso'cket member for receiving a pronged tool, a ring or .sleeveconnected with said socket member,

said sleeve .being formed with a plurality of bracing dogs engaging therear face of each ofthe prongso said tool,'each'of said dogs havinge orshavinggniding pore;

,said prongs, and a dog for each of said prongs arranged on said sleeve,said dogs holding said prongs in their original position when undertension.

4. In a tool holder for pronged dies, a sleeve split on one side, a dogon said sleeve for each oi the prongs ot' said tool, said dog.

being arranged to engage the rear face ot each of said prongs forpreventing a circular distortion of the prongs and for guiding theshavings from the tool to a point exteriorly ot the sleeve, and a screwmember' for drawing said split portions together and move said prongsradially inwardly.

5. In a holder for pronged tools, a sleeve adapted to fit over theprongs Vof the tool, and a plurality of dogs on said sleeve. each ofsaid dogs being formed with a bracing portion fitting against therespective prongs for holding the prongs in their original positionwhile uiider tension, and a beveled guiding portion for guiding theshavings produced by the tool to a point eXterioi-ly oi the sleeve.

(i. In a tool holder ot the character described. a socket member forreceiving a pronged tool, said tool having prongs with beveled outerportions, a sleeve arranged on said socket member and provided withbeveled portions tor engaging the beveled poi'- tion oi the prongs.means tor moving the sleeve toward' the socket member whereby thebeveled portion oi the sleeve will contract or move radially inwardlythe prongs o'l (be tool. and a dog arranged ony said .sleeve Ior eachol' the prongs oi' said tool` .said dogs being l'ormed with `a bracingportion l'or holding` the prongs in their original position and with abeveled chip or shavings guiding portion 'l'or guiding the material cutby thc tool to a point exteriorly ol the sleeve.

7. In a tool holder ot the character described, a member 'for receivinga pronged tool, a sleeve l'ormed so as to be connected tool in thedirection `of the tension or str ain on the tool, said means includingbracing dogs having guideways for directing the shavings or chips to apoint away from the tool. y

9. In a tool holder, a retaining member for holding a pronged cuttingtoohsaiiilre-` taining member being `formed with means for contractingthe cutting portion of said tool, said means including aclamping meniberfor contracting the retaining member and means for preventing anyindependent movement of the prongs except the movement Jfor contractingsaid cutting portion, said last mentioned means being so constructed asto direct the chips and shavings to a point away from the tool.V

l0. In a die holder for pronged dies, a sleeve adapted to fit over theprongs of a die, said sleeve being split at one point, a plurality ofdogs mounted on said sleeve ard engaging the rear face of each of 'saidprongs for preventing any circula-r distortion of the prongs either in ahorizontal plane transverse of the axis of the die or in a planeparallel with the axis oi the die, 'and ineans't'or contracting saidsleeve and for moving said dogs radially inwardly.

l1. In a die holder, a sleeve adapted to receive a pronged die, saidsleeve being pro vided with a dog for each of said prongs, said dogsbeing arranged to engage the rear tace ot' Lach ot' said prongs forpreventing a circular distortion otl the prongs, and means forcontracting said sleevesc as to move said prongs radially inwardly.

l2. In a device ot the character described, the combination with apronged die, of a. holder therefor, said lioldei being provided with abody and with a sleeve, said sleeve being arranged vwith dogs lengagingthe prongs of said die for preventing a circular distortion oi saidprongs, said dogs being Vtoi-med with a guide for directing the chipsfrom the die to a point away from the sleeve.

123. In a device of the character described, the combination with apronged die, of a holder therefor, said holder comprising a body torreceiving the base of the,die and a sleeve adapted toV be connected.with said body. said sleeve ,being split at one point, said sleeve beingalso toi-ined with beveled port-ions adapted to engage the prongs olsaid die and move the saine radially inwardly, means for contracting thesleeve and thereby cause said beveled portions to move' said vprongsradially inwardly, and means arranged .on said sleeve codeting with saidbeveled portions for preventing independent displacement ot' the prongsin a circular direction, `said means being provided with a guidet'ordirecting the chips away from the die.

14. In a de rvice of the character described, the combination with a diehaving prnijigs,

contracting of the sleeve causing said prongs to move radially inwardly.

V.of a holder therefor, said holder comprising.

ing any side bowingmovement thereof, .and

means arranged adjacent said split portions of the sleeve lfforcontractin `the sleeve and lfor movmgsald dogs radial y inwardly,.the

15. In a device of the character described, the combination with a dieformed with prongs having beveled upper surfaces, of Aa lholdercomprising'a body and a sleeve, said body being formed With a socket forreceiving the said die and said sleeve being formed a guidcway `name tothis specification in the with member'shaving inclined planes orbeveledportions and stops or dogs, said' inclined 2o portions'acting againstthe pper surface of Y said prongs for moving the prongs radiallyinwardly and the stops or dogs against the sides ofthe respective prongsfor preventing any independent rotary movement of Athe 25 prongs, saidstops or dogs being'formed with for'directlng the chips away from saiddie. f

In testimony whereof I.: have signed my two subscribing Witnesses.V y

` JAMESM. CARPENTER.: j

' Y Witnesses: f.

ALBERT H.l WHEELER, F. IRVING ENTWISTLE.

presence of 30 l

